Jürgen Klopp's men had drawn three of their last four league matches before the visit of the team from Hamburg, but efforts either side of the break from Lucas Barrios (39) − his tenth top-flight strike of the season − and Ralph Gunesch's own goal (49) took Dortmund 13 points clear of FC Bayern München and Bayer 04 Leverkusen, who host struggling VfB Stüttgart on Sunday.

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